AssetPostprocessor.OnPostprocessTexture(Texture2D)

Description

Add this function in a subclass to get a notification when a texture has completed importing just before.

您可以选择压缩纹理并将其保存到磁盘。

此时，选择压缩格式已为时已晚，不过仍可以使用 texture.Compress 来压缩纹理。 但不建议这么做，且在编辑器中也不会显示 压缩格式。如果要根据纹理的文件名或其他属性来更改压缩格式， 请使用 OnPreprocessTexture。

如果修改了纹理（如下例所示），则它需要处于可读状态。 必须从 Editor 的 Importer 设置中（勾选 Read/Write Enabled）或 OnPreprocessTexture 函数中 将 isReadable 标志设置为 True。如果纹理在运行时不必处于可读状态，请使用 texture.Apply(true, true) 来更新 Mipmap，并在运行时将纹理标记为不可读。

using UnityEditor;
using UnityEngine;
using System.Collections;

// Postprocesses all textures that are placed in a folder
// "invert color" to have their colors inverted.
public class InvertColor : AssetPostprocessor
{
    void OnPostprocessTexture(Texture2D texture)
    {
        // Only post process textures if they are in a folder
        // "invert color" or a sub folder of it.
        string lowerCaseAssetPath = assetPath.ToLower();
        if (lowerCaseAssetPath.IndexOf("/invert color/") == -1)
            return;

        for (int m = 0; m < texture.mipmapCount; m++)
        {
            Color[] c = texture.GetPixels(m);

            for (int i = 0; i < c.Length; i++)
            {
                c[i].r = 1 - c[i].r;
                c[i].g = 1 - c[i].g;
                c[i].b = 1 - c[i].b;
            }
            texture.SetPixels(c, m);
        }
        // Instead of setting pixels for each mip map levels, you can also
        // modify only the pixels in the highest mip level. And then simply use
        // texture.Apply(true); to generate lower mip levels.
    }
}